Morris Minor Owners Club

Posted: **Sun Dec 28, 2003 10:26 pm**

Does anyone out there know if there is an A series timing chain tensioner available that is suitable for a duplex chain? I've only seen them for single chain applications.

Posted: **Sun Jan 04, 2004 12:39 am**

Just fitted a 1984 Metro turbo tensioner, used with a simplex chain, to a duplex set from a Mini 1275 on a Moggie 1098 engine. The tensioner pad is wide enough for the duplex chain. Motivation: had the duplex chain, my simplex chains were all worn, hate engines that sound like a bag of nails.

From the metro you need:
* The cover that fits the tensioner
* A gasket to suit
* the two csk screws that go into the main bearing cap

The cover needed a few mods: there's a bulge inwards where the Metro had a crank sensor which hits the duplex chain. Heated the cover up with a blowtorch and hammered it out. Also, the cover had an engine breather/oil separator which fouls the engine fan. Cut it off and welded/soldered a piece of plate steel over the hole.

I countersunk the Moggie front engine plate, and used threadlock on the screws. Also drilled an extra bolt hole to match the new cover and gasket. The latter was a waste of time because the 1098 block prevents fitting the cover securing bolt.

Not yet back in the car, but the assembly turns freely. Don't anticipate any problems.

Posted: **Sun Jan 04, 2004 10:37 am**

I also found that the timing pointers were half way up the
side of the new chain cover so I moved them to the original
position!

Posted: **Sun Jan 04, 2004 9:36 pm**

Thanx for your replies, thought I'd drawn a blank on this one! BTW the tensioner that I have is from an Ital, I also have the cover, maybe I'm ok to use these, can you recall the width of your tensioner Mike?

Posted: **Sun Jan 04, 2004 11:33 pm**

Forgot to mention - you also need a hole in the engine plate to clear the pivot pin of the tensioner pad. About 12mm to allow the tensioner adjustment movement. The tensioner pad was wider than the duplex chain, from the Haynes pic some are less so. Don't think the Turbo bit has anything to do with that though - Mini books show both.

Agree with Wille - but I marked the pulley instead. Hoping it's easier to see from the top!